printedparts: QR label with gage tag + revision; record taken rev

Label switches from CODE128 to a QR encoding 'TAG|rev' (gage lab tag + latest
print-file revision), so a physical part carries which revision it was printed
from - short payload stays low-version + reliable at 0.5in (margin quiet zone,
EC M, no logo). Item exposes latestrevision; kiosk strips the |rev to resolve
and records the scanned revision on the take (migration 0004 adds
printeditemtransactions.revision) for traceability of which rev was consumed.
Manual entry records a null revision.

tests/test_plugins/test_printedparts_ledger.py

@@ -367,3 +367,34 @@ def test_gagelabtag_assigned_searched_and_kiosk_resolved(client, auth_headers):
     by_digits = client.get('/api/printedparts/kiosk/item/117')
     assert by_digits.status_code == 200
     assert by_digits.get_json()['data']['gagelabtag'] == 'WJRP0117'
+
+
+def test_kiosk_take_records_revision_from_qr(client, app, db, directory_employee):
+    """A label QR payload 'TAG|rev' resolves the item by TAG and records the
+    revision on the take (traceability of which print-file rev was consumed)."""
+    with app.app_context():
+        row = PrintedItem(itemcode='3DP-7000', gagelabtag='WJRP7000',
+                          itemname='Rev part', quantityonhand=10, lowstockthreshold=2)
+        db.session.add(row)
+        db.session.commit()
+        iid = row.printeditemid
+
+    take = client.post('/api/printedparts/kiosk/take', json={
+        'itemcode': 'WJRP7000|3', 'badge': directory_employee, 'quantity': 1})
+    assert take.status_code == 200, take.get_json()
+
+    with app.app_context():
+        txn = PrintedItemTransaction.query.filter_by(
+            printeditemid=iid, transactiontype='take').first()
+        assert txn is not None
+        assert txn.revision == 3
+
+    # Manual entry (no |rev) records a null revision, still resolves.
+    take2 = client.post('/api/printedparts/kiosk/take', json={
+        'itemcode': 'WJRP7000', 'badge': directory_employee, 'quantity': 1})
+    assert take2.status_code == 200
+    with app.app_context():
+        last = (PrintedItemTransaction.query
+                .filter_by(printeditemid=iid, transactiontype='take')
+                .order_by(PrintedItemTransaction.transactionid.desc()).first())
+        assert last.revision is None